import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import welcome from '@/components/welcome'
import User from '@/components/user/User'
import Student from '@/components/Student'
import BodyTemperature from '@/components/BodyTemperature'
import Statistical from '@/components/Statistical'
import Report from '@/components/Report'

Vue.use(Router)

const router = new Router({
  routes: [
    { path: '/',
      redirect: '/report' },
    { path: '/login',
      component: Login },
    {
      path: '/home',
      component: Home,
      redirect: '/welcome',
      children: [{
        path: '/welcome',
        component: welcome
      },
      {
        path: '/user',
        component: User
      },
      {
        path: '/student',
        component: Student
      },
      {
        path: '/bodyTemperature',
        component: BodyTemperature
      },
      {
        path: '/statistical',
        component: Statistical
      }
      ]
    },
    { path: '/report',
      component: Report }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行
  //     next()  放行    next('/login')  强制跳转
  if(to.path === '/report') return next()

  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
